EP0180761A1 - Circuit arrangement for the vertical deflection of electron beams in television picture tubes - Google Patents

Circuit arrangement for the vertical deflection of electron beams in television picture tubes Download PDF

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Publication number
EP0180761A1
EP0180761A1 EP85112343A EP85112343A EP0180761A1 EP 0180761 A1 EP0180761 A1 EP 0180761A1 EP 85112343 A EP85112343 A EP 85112343A EP 85112343 A EP85112343 A EP 85112343A EP 0180761 A1 EP0180761 A1 EP 0180761A1
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EP
European Patent Office
Prior art keywords
capacitor
circuit
voltage
comparator
circuit arrangement
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EP85112343A
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German (de)
French (fr)
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EP0180761B1 (en
Inventor
Pierre-Axel Berland
Jean-Claude Rufray
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Deutsche Thomson Brandt GmbH
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Deutsche Thomson Brandt GmbH
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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K4/00—Generating pulses having essentially a finite slope or stepped portions
    • H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
    • H03K4/08—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape
    • H03K4/48—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices
    • H03K4/60—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices in which a sawtooth current is produced through an inductor
    • H03K4/69—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices in which a sawtooth current is produced through an inductor using a semiconductor device operating as an amplifier
    • H03K4/72—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices in which a sawtooth current is produced through an inductor using a semiconductor device operating as an amplifier combined with means for generating the driving pulses
    • H03K4/725—Push-pull amplifier circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K4/00—Generating pulses having essentially a finite slope or stepped portions
    • H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
    • H03K4/08—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape
    • H03K4/48—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices
    • H03K4/50—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices in which a sawtooth voltage is produced across a capacitor
    • H03K4/501—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices in which a sawtooth voltage is produced across a capacitor the starting point of the flyback period being determined by the amplitude of the voltage across the capacitor, e.g. by a comparator
    • H03K4/502—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices in which a sawtooth voltage is produced across a capacitor the starting point of the flyback period being determined by the amplitude of the voltage across the capacitor, e.g. by a comparator the capacitor being charged from a constant-current source
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections
    • H04N3/22—Circuits for controlling dimensions, shape or centering of picture on screen

Definitions

  • the invention is based on a circuit arrangement for the vertical deflection of electron beams in television ' picture tubes by means of a capacitor which can be charged by a constant current source for generating a control signal for the vertical deflection output stage, the capacitor being periodically discharged after an vertical deflection period via an electronic switch and the control signal for the electronic switch is derived from a counter circuit which counts the lines of the television picture and which activates a first comparator circuit which compares the actual voltage across the capacitor with a reference voltage.
  • a circuit is known from the integrated circuit TEA 2026 since March 1983.
  • the sawtooth voltage generated has a DC voltage component on which it is superimposed.
  • a change in this DC voltage causes a vertical image shift.
  • the amplitude of the sawtooth voltage and thus the image height can be changed in various ways, be it by changing the gain of the current generator or by changing the negative feedback of the power amplifier.
  • the circuit mentioned still has major disadvantages.
  • the image format changes when the capacitor changes due to aging, temperature, etc.
  • the image height and position are also shifted.
  • the amplitude adjustment and image position adjustment are not independent of each other. If the image height changes, ie the amplitude of the deflection current, this occurs asymmetrically to the center of the image. After adjusting the amplitude, an image correction is required.
  • the object of the invention is to eliminate these disadvantages. This object is achieved by the invention specified in the patent claim. Further advantageous embodiments of the invention result from the subclaims.
  • the invention has the advantage that the image position is regulated automatically and that amplitude changes take place symmetrically to the center of the image.
  • the amplitude adjustment and image shift can be carried out without actuators and the circuit is particularly suitable in connection with microprocessor control, in which the required settings are made via digital-to-analog converters.
  • the circuit is first described as it is implemented in the integrated circuit TEA 2026.
  • a capacitor 1 is charged by a constant current source 2.
  • a sawtooth-shaped control voltage for an amplifier 3 whose amplification can be controlled is produced at the capacitor 1.
  • the capacitor 1 is discharged at the end of the vertical deflection with the aid of an electronic switch 4 which is controlled by a comparator circuit 5.
  • the comparator circuit 5 is switched active with the aid of a counter circuit 6.
  • the counter circuit 6 counts line-frequency pulses H and generates a control pulse V after a number of lines corresponding to a field. During this pulse, the capacitor 1 discharges to the reference voltage Ur1 specified at a comparator input, after which the capacitor 1 is recharged.
  • the voltage which arises at the output of the amplifier stage 3 is applied to the input of an output stage 7, which supplies the deflection current necessary for the vertical deflection winding 8.
  • a resistor 9 is connected in series with the deflection winding 8, at which a negative feedback voltage for the output stage 7 can be tapped.
  • FIG. 2 shows the modified circuit in which the elements explained in FIG. 1 are provided with the same reference numbers.
  • a second controllable current source 10 is connected in parallel with the first constant current source 2.
  • This current source can be controlled in such a way that it charges the. current for the capacitor 1 supplemented so that the voltage across the capacitor adjusts to a fixed value with respect to a deflection time. This time is related to the middle of the vertical deflection.
  • the actual voltage across capacitor 1 is compared with a fixed reference voltage Ur2 with the aid of a further comparator circuit 11.
  • This reference voltage corresponds to a voltage which must be present at the capacitor 1 in order to deflect the electron beam vertically up to the center. The comparison takes place during a line in the middle of the picture.
  • the amplitude of the deflection can be changed by changing the voltage Ur1.
  • the amplitude is e.g. thereby increased that the reference voltage applied to the comparator 5 is reduced so that the capacitor 1 is discharged to a smaller voltage value at a later point in time.
  • the amplitude is increased symmetrically by the second control loop, which keeps the center tension of the flanking constant.
  • the deflection amplitude and thus the image format change. It is therefore necessary to change the reference voltage Ur1 in order to keep the format constant.
  • a variable relevant to the operating voltage U B and the amplitude setting variable U A are fed to a multiplier circuit 13.
  • the reference voltage Ur1 is derived from these two quantities. If, for example, the magnitude U B decreases as a result of an increase in the beam current, the multiplier circuit 13 also automatically lowers the reference voltage Ur1 - as a result of which the deflection amplitude increases.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Details Of Television Scanning (AREA)

Abstract

In Bildmitte wird die am Kondensator (1) des Sägezahngenerators anliegende Spannung mit einem Sollwert verglichen und bei Abweichung wird die Konstantstromquelle (2) eine vom Komparator (11) steuerbare Stromquelle (10) parallelgeschaltet. Hierdurch wird die Bildlage konstantgehalten indem die Bildmitte auf einem vorgegebenen Niveau gehalten wird.In the middle of the picture, the voltage applied to the capacitor (1) of the sawtooth generator is compared with a target value and, in the event of a deviation, the constant current source (2) is connected in parallel with a current source (10) which can be controlled by the comparator (11). This keeps the image position constant by keeping the center of the image at a predetermined level.

Description

Die Erfindung geht aus.von einer Schaltungsanordnung für die Vertikalablenkung von Elektronenstrahlen in Fernseh-' bildröhren mittels eines durch eine Konstantstromquelle aufladbaren Kondensators zur Erzeugung eines Steuersignals für die Vertikalablenkendstufe, wobei der Kondensator periodisch nach einer vertikalen Ablenkperiode über einen elektronischen Schalter entladen wird und das Steuersignal für den elektronischen Schalter von einer die Zeilen des Fernsehbildes zählenden Zählschaltung ab- ..geleitet wird, die eine erste Komparatorschaltung aktiviert, welche die am Kondensator liegende Ist-Spannung mit einer Referenzspannung vergleicht. Eine derartige Schaltung ist bekannt durch die integrierte Schaltung TEA 2026 seit März 1983.The invention is based on a circuit arrangement for the vertical deflection of electron beams in television ' picture tubes by means of a capacitor which can be charged by a constant current source for generating a control signal for the vertical deflection output stage, the capacitor being periodically discharged after an vertical deflection period via an electronic switch and the control signal for the electronic switch is derived from a counter circuit which counts the lines of the television picture and which activates a first comparator circuit which compares the actual voltage across the capacitor with a reference voltage. Such a circuit is known from the integrated circuit TEA 2026 since March 1983.

Die erzeugte Sägezahnspannung besitzt eine Gleichspannungskomponente der sie überlagert ist. Eine Veränderung dieser Gleichspannung bewirkt eine vertikale Bildverschiebung. Die Amplitude der Sägezahnspannung und damit die Bildhöhe kann auf verschiedene Weise verändert werden, sei es durch Verändern der Verstärkung des Stromgenerators oder durch Änderung der Gegenkopplung des Endverstärkers. Die genannte Schaltung besitzt jedoch noch große Nachteile. So ändert sich z.B. das Bildformat bei Änderung des Kondensators durch Alterung, Temperatur usw. Auch die Bildhöhe und die Bildlage werden dabei verschoben. Die Amplitudeneinstellung und Bildlageeinstellung sind nicht unabhängig voneinander. Bei einer Änderung der Bildhöhe, d.h. der Amplitude des Ablenkstromes, erfolgt diese unsymmetrisch zur Bildmitte. Nach der Amplitudeneinstellung ist eine Bildlagekorrektur erforderlich.The sawtooth voltage generated has a DC voltage component on which it is superimposed. A change in this DC voltage causes a vertical image shift. The amplitude of the sawtooth voltage and thus the image height can be changed in various ways, be it by changing the gain of the current generator or by changing the negative feedback of the power amplifier. However, the circuit mentioned still has major disadvantages. For example, the image format changes when the capacitor changes due to aging, temperature, etc. The image height and position are also shifted. The amplitude adjustment and image position adjustment are not independent of each other. If the image height changes, ie the amplitude of the deflection current, this occurs asymmetrically to the center of the image. After adjusting the amplitude, an image correction is required.

Der Erfindung liegt die Aufgabe zugrunde, diese Nachteile zu beseitigen. Diese Aufgabe wird durch die im Patentanspruch angegebene Erfindung gelöst. Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen. Die Erfindung bringt den Vorteil, daß die Bildlage automatisch geregelt wird und daß Amplituden- änderungen symmetrisch zur Bildmitte erfolgen. Die Amplitudeneinstellung und Bildlageverschiebung können ohne Stellglieder vorgenommen werden und die Schaltung eignet sich insbesondere in Verbindung mit Mikroprozessorsteuerung, bei welcher die erforderlichen Einstellungen über Digital-Analog-Wandler erfolgen.The object of the invention is to eliminate these disadvantages. This object is achieved by the invention specified in the patent claim. Further advantageous embodiments of the invention result from the subclaims. The invention has the advantage that the image position is regulated automatically and that amplitude changes take place symmetrically to the center of the image. The amplitude adjustment and image shift can be carried out without actuators and the circuit is particularly suitable in connection with microprocessor control, in which the required settings are made via digital-to-analog converters.

Nachstehend soll die Erfindung an einem Ausführungsbei - spiel mit Hilfe der Zeichnung erläutert werden.

  • Figur 1 zeigt eine Schaltung nach dem Stand der Technik}
  • Figur 2 zeigt die Schaltung mit den Maßnahmen nach der Erfindung.
The invention will be explained below using an exemplary embodiment with the aid of the drawing.
  • Figure 1 shows a circuit according to the prior art}
  • Figure 2 shows the circuit with the measures according to the invention.

In Figur 1 sei zunächst die Schaltung beschrieben, wie sie in. der integrierten Schaltung TEA 2026 verwirklicht ist.In FIG. 1, the circuit is first described as it is implemented in the integrated circuit TEA 2026.

Ein Kondensator 1 wird von einer Konstantstromquelle 2 aufgeladen. An dem Kondensator 1 entsteht eine sägezahnförmige Steuerspannung für einen in seiner Verstärkung steuerbaren Verstärker 3. Die am Ende der Vertikalablenkung erfolgende Entladung des Kondensators 1 geschieht mit Hilfe eines elektronischen Schalters '4, der von einer Komparatorschaltung 5 angesteuert wird. Die Komparatorschaltung 5 wird mit Hilfe einer Zählschaltung 6 aktiv geschaltet. Die Zählschaltung 6 zählt zeilenfrequente Impulse H und erzeugt nach einer einem Halbbild entsprechenden Zeilenzahl ein Steuerimpuls V. Während dieses Impulses entläd sich der Kondensator 1 auf die durch die an einem Komparatoreingang vorgegebene Referenzspannung Ur1, wonach der Kondensator 1 wieder aufgeladen wird. Die am Ausgang der Verstärkerstufe 3 entstehende Spannung wird auf den Eingang einer Endstufe 7 gegeben, die den für die Vertikal-ablenkwicklung 8 notwendigen Ablenkstrom liefert. In Serie .zur Ablenkwicklung 8 ist ein Widerstand 9 geschaltet, an welchem eine Gegenkopplungsspannung für die Endstufe 7 abgreifbar ist. Bei Veränderung der Referenzspannung Ur1 ändert sich die Bildlage, da die Amplitude durch die Konstantstromquelle konstant gehalten wird.A capacitor 1 is charged by a constant current source 2. A sawtooth-shaped control voltage for an amplifier 3 whose amplification can be controlled is produced at the capacitor 1. The capacitor 1 is discharged at the end of the vertical deflection with the aid of an electronic switch 4 which is controlled by a comparator circuit 5. The comparator circuit 5 is switched active with the aid of a counter circuit 6. The counter circuit 6 counts line-frequency pulses H and generates a control pulse V after a number of lines corresponding to a field. During this pulse, the capacitor 1 discharges to the reference voltage Ur1 specified at a comparator input, after which the capacitor 1 is recharged. The voltage which arises at the output of the amplifier stage 3 is applied to the input of an output stage 7, which supplies the deflection current necessary for the vertical deflection winding 8. A resistor 9 is connected in series with the deflection winding 8, at which a negative feedback voltage for the output stage 7 can be tapped. When the reference voltage Ur1 changes, the image position changes because the amplitude is kept constant by the constant current source.

In Figur 2 ist die abgewandelte Schaltung dargestellt, in welcher die in Figur 1 erläuterten Elemente mit den gleichen Bezugsziffern versehen sind.FIG. 2 shows the modified circuit in which the elements explained in FIG. 1 are provided with the same reference numbers.

Parallel zur ersten Konstantstromquelle 2 ist eine zweite regelbare Stromquelle 10 geschaltet. Diese Stromquelle ist derart steuerbar, daß sie den Lade- . strom für den Kondensator 1 so ergänzt, daß sich die Spannung am Kondensator bezüglich eines Ablenkzeitpunktes auf einen Festwert einstellt. Dieser Zeitpunkt ist auf die Mitte der Vertikalablenkung bezogen. Dazu wird mit Hilfe einer weiteren Komparatorschaltung 11 die Ist-Spannung am Kondensator 1 mit einer festen Referenzspannung Ur2 verglichen. Diese Referenzspannung entspricht einer Spannung, die am Kondensator 1 anliegen muß, um den Elektronenstrahl vertikal bis zur Mitte abzulenken. Der Vergleich findet dabei während einer Zeile in Bildmitte statt. Dies geschieht mit Hilfe der Zählschaltung 6, die nach einer entsprechenden Zeilenzahl durch den Impuls V/2 die Komparatorschaltung 11 aktiviert. Weicht die am Kondensator 1 liegende Spannung von dem zu diesem gegebenen Zeitraum vorgegebenen Sollwert ab, entsteht ein Steuerimpuls am Ausgang der Komparatorschaltung 11. Dieser Wert wird mittels des Kondensators 12 für eine Bildperiode konstant gehalten.A second controllable current source 10 is connected in parallel with the first constant current source 2. This current source can be controlled in such a way that it charges the. current for the capacitor 1 supplemented so that the voltage across the capacitor adjusts to a fixed value with respect to a deflection time. This time is related to the middle of the vertical deflection. For this purpose, the actual voltage across capacitor 1 is compared with a fixed reference voltage Ur2 with the aid of a further comparator circuit 11. This reference voltage corresponds to a voltage which must be present at the capacitor 1 in order to deflect the electron beam vertically up to the center. The comparison takes place during a line in the middle of the picture. This is done with the aid of the counter circuit 6, which activates the comparator circuit 11 after a corresponding number of lines by means of the pulse V / 2. If the voltage across capacitor 1 deviates from the target value specified for this given period of time, a control pulse is generated at the output of comparator circuit 11. This value is kept constant for one frame period by means of capacitor 12.

Durch Verändern der Spannung Ur1 kann die Amplitude der Ablenkung verändert werden. Die Amplitude wird z.B. dadurch vergrößert, daß an den Komparator 5 angelegte Referenzspannung verkleinert wird, so daß die Entladung des Kondensators 1 auf einen kleineren Spannungswert zu einem späteren Zeitpunkt erfolgt. Durch die zweite Regelschleife, die die Mittenspannung der Ablankung konstant hält, wird die Amplitude symmetrisch vergrößert.The amplitude of the deflection can be changed by changing the voltage Ur1. The amplitude is e.g. thereby increased that the reference voltage applied to the comparator 5 is reduced so that the capacitor 1 is discharged to a smaller voltage value at a later point in time. The amplitude is increased symmetrically by the second control loop, which keeps the center tension of the flanking constant.

Bei Schwankungen der Betriebsspannung z.B. für die Vertikalablenkung infolge von Strahlstromänderungen ändert sich die Ablenkamplitude und damit das Bildformat. Es ist deshalb notwendig die Referenzspannung Ur1 zu ändern, um das Format konstant zu halten. Hierzu wird einer Muliplizierschaltung 13 eine der Betriebsspannung UB maßgebliche Größe sowie die Amplitudeneinstellgröße UA zugeführt. Aus diesen beiden Größen wird die Referenzspannung Ur1 abgeleitet. Erniedrigt sich z.B. infolge einer Strahlstromerhöhung die Größe UB wird die Multiplizierschaltung 13 automatisch auch die Referenzspannung Ur1 erniedrigt - wodurch die AblenkAmplitude ansteigt.In the event of fluctuations in the operating voltage, for example for vertical deflection as a result of beam current changes, the deflection amplitude and thus the image format change. It is therefore necessary to change the reference voltage Ur1 in order to keep the format constant. For this purpose, a variable relevant to the operating voltage U B and the amplitude setting variable U A are fed to a multiplier circuit 13. The reference voltage Ur1 is derived from these two quantities. If, for example, the magnitude U B decreases as a result of an increase in the beam current, the multiplier circuit 13 also automatically lowers the reference voltage Ur1 - as a result of which the deflection amplitude increases.

Bezugszeichenliste für Akte T-PA 533 --------------------------------------------Reference number list for file T-PA 533 ------------------------------------------- -

  • 1 Kondensator1 capacitor
  • 2 Konstantstromquelle2 constant current source
  • 3 Verstärker3 amplifiers
  • 4 Schalter4 switches
  • 5 Komparator5 comparator
  • 6 Zählschaltung6 counter circuit
  • 7 Vertikalendstufe7 vertical output stage
  • 8 Vertikal-Ablenkwicklung8 vertical deflection winding
  • 9 Gegenkopplungswiderstand9 negative feedback resistance
  • 10 steuerbare Stromquelle10 controllable power source
  • 11 Komparator11 comparator
  • 12 Kondensator12 capacitor
  • 13 Multiplizierschaltung13 multiplier circuit

Claims (8)

1. Schaltungsanordnung für die Vertikalablenkung von Elektronenstrahlen in Fernsehbildröhren mittels eines durch eine Konstantstromquelle aufladbaren Kondensators zur Erzeugung eines Steuersignals für die V-Ablenkendstufe, wobei der Kondensator periodisch nach einer vertikalen Ablankperiode über einen elektronischen Schalter entladen wird und das Steuersignal für den elektronischen Schalter von einer die Zeilen des Fernsehbildes zählenden Zählschaltung abgeleitet wird, die eine erste Komparatorschaltung aktiviert,welche die am Kondensator liegende Ist-Spannung mit einer Referenzspannung vergleicht, dadurch gekennzeichnet, daß parallel zur Konstantstromquelle (2) eine weitere regelbare Stromquelle (10) geschaltet ist, welche den Ladestrom des Kondensators (1) derart steuert, daß die der Bildmitte entsprechende Spannung des Kondensators auf einen konstanten Wert gehalten wird.1. Circuit arrangement for the vertical deflection of electron beams in television picture tubes by means of a capacitor which can be charged by a constant current source for generating a control signal for the V deflection output stage, the capacitor being periodically discharged after an vertical period of slowing down via an electronic switch and the control signal for the electronic switch from one the lines of the television picture-counting circuit is derived, which activates a first comparator circuit which compares the actual voltage across the capacitor with a reference voltage, characterized in that a further controllable current source (10) is connected in parallel with the constant current source (2) and which Charging current of the capacitor (1) controls such that the voltage of the capacitor corresponding to the center of the picture is kept at a constant value. 2. Schaltungsanordnung nach Anspruch 1, dadurch gekennzeichnet, daß an den Kondensator (1) eine zweite Komparatorschaltung (11) geschaltet ist, die die Spannung am Kondensator (1) mit einem Sollwert (Ur2) vergleicht, welche bei Abweichung von diesem Sollwert eine Steuerspannung für die regelbare Stromquelle (10) erzeugt.2. Circuit arrangement according to claim 1, characterized in that a second comparator circuit (11) is connected to the capacitor (1), which compares the voltage across the capacitor (1) with a target value (Ur2), which, if this target value deviates, a control voltage generated for the controllable current source (10). 3. Schaltungsanordnung nach Anspruch 2, dadurch gekennzeichnet, daß die zweite Komparatorschaltung (11) von der Zählschaltung (6) während einer der Mitte des Bildhinlaufs entsprechenden Zeit aktiv geschaltet ist.3. Circuit arrangement according to claim 2, characterized in that the second comparator circuit (11) of the counting circuit (6) is activated during a time corresponding to the middle of the image run. 4. Schaltungsanordnung nach Anspruch 2, dadurch gekennzeichnet, daß der Betrag der an den zweiten Komparator (11) gelegten Vergleichsspannung (r2) der am Kondensator (1) anliegenden Sollspannung für die Hälfte des vertikalen Hinlaufs des Elektronenstrahls entspricht.4. Circuit arrangement according to claim 2, characterized in that the amount of the comparison voltage (r 2 ) applied to the second comparator (11) corresponds to the nominal voltage applied to the capacitor (1) for half the vertical run of the electron beam. 5. Schaltungsanordnung nach Anspruch 2 bis 4, dadurch gekennzeichnet, daß an den Ausgang des zweiten Komparators (11) ein Kondensator (12) geschaltet ist, der den von dem zweiten Komparator (11) erzeugten Spannungswert für die Dauer einer vertikalen Ablenkperiode speichert.5. Circuit arrangement according to claim 2 to 4, characterized in that a capacitor (12) is connected to the output of the second comparator (11), which stores the voltage value generated by the second comparator (11) for the duration of a vertical deflection period. 6. Schaltungsanordnung nach Anspruch 1, dadurch gekennzeichnet, daß die der ersten Komparatorschaltung (5) zugeführte Referenzspannung (Ur1) zur Amplitudeneinstellung der Ablenkung dient.6. Circuit arrangement according to claim 1, characterized in that the reference voltage (Ur1) supplied to the first comparator circuit (5) is used for adjusting the amplitude of the deflection. 7. Schaltungsanordnung nach Anspruch 2, dadurch gekennzeichnet, daß die der zweiten Komparatorschaltung (11) zugeführte Referenzspannung (Ur2) zur Bildlageverschiebung dient.7. Circuit arrangement according to claim 2, characterized in that the reference voltage (Ur2) supplied to the second comparator circuit (11) is used for shifting the image position. 8. Schaltungsanordnung nach Anspruch 6, dadurch gekennzeichnet, daß an den Referenzspannungseingang (Ur1) der Komparatorschaltung (5) eine Multiplizierschaltung (13) angeschlossen ist, welche aus ihr zugeführten Steuergrößen (UA, UB) die Referenzspannung (Ur1) derart nachstellt, daß die Ablenkamplitude und damit das Bildformat konstant bleibt.8. A circuit arrangement according to claim 6, characterized in that a multiplier circuit (13) is connected to the reference voltage input (Ur1) of the comparator circuit (5), which multiplies the control voltage (U A , U B ) supplied from it to readjust the reference voltage (Ur1) in such a way that that the deflection amplitude and thus the picture format remains constant.
EP85112343A 1984-11-02 1985-09-28 Circuit arrangement for the vertical deflection of electron beams in television picture tubes Expired - Lifetime EP0180761B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843440024 DE3440024A1 (en) 1984-11-02 1984-11-02 CIRCUIT ARRANGEMENT FOR THE VERTICAL DEFLECTION OF ELECTRON BEAMS IN TELEVISION TUBES
DE3440024 1984-11-02

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EP0180761A1 true EP0180761A1 (en) 1986-05-14
EP0180761B1 EP0180761B1 (en) 1990-03-14

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EP85112343A Expired - Lifetime EP0180761B1 (en) 1984-11-02 1985-09-28 Circuit arrangement for the vertical deflection of electron beams in television picture tubes

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US (1) US4686432A (en)
EP (1) EP0180761B1 (en)
JP (1) JPS61111073A (en)
DE (2) DE3440024A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2578666A1 (en) * 1985-03-05 1986-09-12 Sgs Microelettronica Spa CONTROL CIRCUIT WITH COMPENSATION FOR VARIATIONS IN ANODIC VOLTAGE, FOR VERTICAL DEVICE STAGE OF TELEVISION
EP0310419A2 (en) * 1987-09-30 1989-04-05 Kabushiki Kaisha Toshiba Vertical deflection circuit for cathode ray tube display device
EP0578142A2 (en) * 1992-07-10 1994-01-12 Thomson Consumer Electronics, Inc. Picture height adjustment arrangement for a video display
TR28061A (en) * 1992-03-02 1996-01-02 Thomson Consumer Electronics A deflection circuit with a controllable saw signal generator.

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US5049673A (en) * 1987-10-30 1991-09-17 The Regents Of The University Of California Fluorescent indicator dyes for calcium working at long wavelengths
DE4009920A1 (en) * 1990-03-28 1991-10-02 Thomson Brandt Gmbh CIRCUIT ARRANGEMENT FOR GENERATING A VERTICAL FREQUENCY DEFLECTION CURRENT
DK0487796T3 (en) * 1990-11-27 1995-12-18 Ibm CRT
US5587631A (en) * 1992-03-02 1996-12-24 Thomson Consumer Electronics, Inc. Resistor-matched deflection apparatus for a video display
US5243263A (en) * 1992-03-02 1993-09-07 Thomson Consumer Electronics, Inc. Service adjustment arrangement for a sawtooth generator of a video display
US5412290A (en) * 1994-03-08 1995-05-02 Thomson Consumer Electronics, Inc. 50 Hz parabolic signal filter
EP0870399B1 (en) * 1996-10-14 2003-03-26 Koninklijke Philips Electronics N.V. Deflection with damping impedance compensation
KR200172693Y1 (en) * 1997-07-31 2000-03-02 윤종용 Horizontal position control circuit of raster
US5926042A (en) * 1997-12-19 1999-07-20 Advanced Micro Devices, Inc. Precision clock frequency detector having reduced supply voltage dependence
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FR2578666A1 (en) * 1985-03-05 1986-09-12 Sgs Microelettronica Spa CONTROL CIRCUIT WITH COMPENSATION FOR VARIATIONS IN ANODIC VOLTAGE, FOR VERTICAL DEVICE STAGE OF TELEVISION
EP0310419A2 (en) * 1987-09-30 1989-04-05 Kabushiki Kaisha Toshiba Vertical deflection circuit for cathode ray tube display device
EP0310419A3 (en) * 1987-09-30 1991-03-27 Kabushiki Kaisha Toshiba Vertical deflection circuit for cathode ray tube display device
TR28061A (en) * 1992-03-02 1996-01-02 Thomson Consumer Electronics A deflection circuit with a controllable saw signal generator.
EP0578142A2 (en) * 1992-07-10 1994-01-12 Thomson Consumer Electronics, Inc. Picture height adjustment arrangement for a video display
EP0578142A3 (en) * 1992-07-10 1994-08-10 Thomson Consumer Electronics Picture height adjustment arrangement for a video display
EP0891079A2 (en) * 1992-07-10 1999-01-13 Thomson Consumer Electronics, Inc. Picture height adjustment arrangement for a video display
EP0891079A3 (en) * 1992-07-10 2001-03-14 Thomson Consumer Electronics, Inc. Picture height adjustment arrangement for a video display

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EP0180761B1 (en) 1990-03-14
US4686432A (en) 1987-08-11
JPS61111073A (en) 1986-05-29
DE3576623D1 (en) 1990-04-19
JPH0513423B2 (en) 1993-02-22
DE3440024A1 (en) 1986-05-07

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